docker-machine-xhyve: fix file mode inconsistencies

File modes are not properly translated from L9P to host values.
Instead, they are assumed to be identical, which is wrong on macOS.
machine-drivers/docker-machine-driver-xhyve#225

(cherry picked from commit 338386b)

Author: mroi

pkgs/applications/networking/cluster/docker-machine/xhyve.nix

@@ -1,11 +1,17 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, pkgconfig, cctools, Hypervisor, vmnet }:
+{ stdenv, buildGoPackage, fetchFromGitHub, fetchpatch, pkgconfig, cctools, Hypervisor, vmnet }:
 
 buildGoPackage rec {
   pname = "docker-machine-xhyve";
   version = "0.4.0";
 
   goPackagePath = "github.com/zchee/docker-machine-driver-xhyve";
 
+  # https://github.com/machine-drivers/docker-machine-driver-xhyve/pull/225
+  patches = fetchpatch {
+    url = "https://github.com/machine-drivers/docker-machine-driver-xhyve/commit/546256494bf2ccc33e4125bf45f504b0e3027d5a.patch";
+    sha256 = "1i8wxqccqkxvqrbsyd0g9s0kdskd8xi2jv0c1bji9aj4rq0a8cgz";
+  };
+
   preBuild = ''
     make -C go/src/${goPackagePath} CC=${stdenv.cc}/bin/cc LIBTOOL=${cctools}/bin/libtool GIT_CMD=: lib9p
     export CGO_CFLAGS=-I$(pwd)/go/src/${goPackagePath}/vendor/github.com/jceel/lib9p